Enthalpy of vaporisation of napthalene is 48.5 kJ/mol and enthalpy of fusion of napthalene is 22.5 kJ/mol, then enthalpy of subtlimation of naphthalene will be

At 298 K, the enthalpy of fusion of a solid (X) is 2 . 8 kj mol^(-1) and the enthalpy of vaporisation of the liquid (X) is 98.2 kJ mol^(-1) The enthalpy of sublimation of the substance (X) in kj mol^(-1) is _______(in nearest integer)

If the enthalpy of formation of H_2O(l) is -x kj/mol and enthalpy of neutralization of HCl and NaOH is -y kj/mol then enthalpy of formation of OH^-1 ion (in kJ/mol) is

If the enthalpy of vaporisation of water is 186.5 kJ mol^(-1) , then entropy of its vaporisation will be

The enthalpy of vaporisation of water is 186.5 kJ mol^(-1) . The entropy of its vaporisation will be :

If enthalpy of hydrogenation of cyclohexene is [-x kJ mol^-1] and resonance energy of benzene is [-y kJ mol^-1] then the enthalpy of hydrogenation of benzene will be